I get UV light treatment on the public health system in Ireland. In Dublin, there is
a dedicated centre is based on St Vincents Hospital, which I am very impressed by. I don't know what facilities exist ourtside of Dublin.
Please PM me if you would like to discuss this more privately.
Regardless of whether you get private health insurance, you should immediately go to a GP , explain the details of your sons medical condition and ask for an emergency referral to a public consultant . There will be a waiting list for an initial consultantion so do it immediately. Once you are a patient of a consultant, you should be able to assess UV treatment quickly in a flare-up situation.